Fiber Type Choose single-mode for long-distance transmission and multimode for shorter runs. Connector Compatibility Match the connector (LC, SC, ST, etc. Fiber Count Select based on network. Executive Summary: A fiber optic pigtail is one of the most commonly specified yet least understood components in structured cabling. Get the wrong connector type, the wrong polish, or skip proper fusion splicing technique—and you're looking at elevated signal loss, increased back reflection, and a. A fiber optic pigtail is a short length of optical fiber —typically 0. 5m to 2m—that has a factory-terminated connector on one end and bare fiber on the other end. The bare fiber end. In fiber optic cable installation, how cables are attached to the system is vital to the success of network.